Fabrication of redox-active polyoxometalate-based ionic crystals onto single-walled carbon nanotubes as high-performance anode materials for lithium-ion batteries,Inorganic Chemistry Frontiers

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Fabrication of redox-active polyoxometalate-based ionic crystals onto single-walled carbon nanotubes as high-performance anode materials for lithium-ion batteries
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020/02/04 , DOI: 10.1039/c9qi01636h
Bushra Iqbal _{1,

2,

3,

4,

5} , Xueying Jia _{1,

2,

3,

4,

5} , Hanbin Hu _{1,

2,

3,

4,

5} , Lei He _{1,

2,

3,

4,

5} , Wei Chen _{1,

2,

3,

4,

5} , Yu-Fei Song _{1,

2,

3,

4,

5}

Affiliation

Polyoxometalate (POM)-based molecular cluster batteries have attracted wide interest due to their rich redox properties. To date, no studies on POM-based ionic crystals for LIBs have been reported, although the redox-active metals can be incorporated and finely tuned in the ionic crystals. Herein, a POM-based ionic crystal (denoted as Composite 1) was prepared for the first time by the complexation of the trinuclear acetate-bridged cobalt-containing macrocation ([Co₃O(CH₃CO₂)₆(C₅H₅N)₃]⁺) with the anion [PMo₁₂O₄₀]³⁻. Further interaction of Composite 1 and single-walled carbon nanotubes (SWNTs) resulted in the formation of a novel Composite 1/SWNT nanocomposite through a facile one-pot strategy, in which the Composite 1 clusters were uniformly grown onto the surface of SWNTs. The as-prepared Composite 1/SWNT nanocomposite showed outstanding electrochemical performance as an anode material of LIBs by delivering a storage capacity of 1012 mA h g⁻¹ at 100 mA g⁻¹ for 100 cycles. The results may open a new pathway for exploring novel anode materials of LIBs.

中文翻译：

在单壁碳纳米管上制备基于氧化还原活性的多金属氧酸盐的离子晶体，作为锂离子电池的高性能阳极材料

基于多金属氧酸盐（POM）的分子簇电池由于其丰富的氧化还原特性而引起了广泛的关注。迄今为止，还没有关于LIB的基于POM的离子晶体的研究的报道，尽管氧化还原活性金属可以并入离子晶体中并进行微调。在此，通过三核乙酸酯桥联的含钴大阳离子（[Co ₃ O（CH ₃ CO ₂）₆（C ₅ H ₅））的络合，首次制备了基于POM的离子晶体（表示为复合物1）。N）₃ ] ⁺）与阴离子[PMo ₁₂ O ₄₀ ] ³⁻。复合材料1和单壁碳纳米管（SWNTs）的进一步相互作用通过一种简便的一锅策略形成了新型的复合材料1 / SWNT纳米复合材料，其中复合材料1簇均匀地生长在SWNTs的表面上。所制备的复合物1 / SWNT纳米复合材料通过在100mA g ^-1下提供1012 mA hg ^-1的100个循环的存储容量，显示出作为LIBs阳极材料的出色电化学性能。该结果可能为探索锂离子电池的新型阳极材料开辟新途径。

更新日期：2020-03-19

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